PREHEAT oven to 400°F. Mix flour, sugar, baking powder and salt in large bowl. Beat egg, milk and oil with wire whisk until well blended. Add to flour mixture; stir just until moistened. (Batter will be lumpy.) Stir in cereal and blueberries.
SPOON evenly into 12 greased or paper-lined medium muffin cups, filling each cup two-thirds full.
BAKE 18 to 20 min. or until golden brown. Serve warm.